The ornamental design for a lamp, as shown and described.
The file of this patent contains a least one drawing executed in color. Copies of this patent with color drawings will be provided by the United States Patent and Trademark Office upon request and payment of the necessary fee.
FIG. 1 is a right side view of the inventive lamp;
FIG. 2 is a left side view of the inventive lamp;
FIG. 3 is an angled right side view of the inventive lamp;
FIG. 4 is an angled left side view of the inventive lamp; and,